1、 毕业设计说明书 作 者: 学 号: 系: 土木工程系 专业: 土木工程(道桥方向) 题 目: 石清公路平山冶河桥设计(方案三) 2013 年 6 月 3 日 1 毕 业 设 计 ( 论 文 ) 中 文 摘 要 石清公路平山冶河桥设计(方案三) 摘要:摘要: 我的毕业设计主要是计算预应力混凝土连续梁桥的上部结构, 预应力混凝土 的连续梁桥为超静定结构,其受力较为科学、伸缩缝少、桥的整体变形不大、带来 行车平顺舒适、抵抗地震的能力强、并且其的养护工程量相对来说比较小,所以现 如今成为了最具有竞争力的桥型之一。 设计的主要过程: 第一,确定桥型及主梁的主要构造及细部结构尺寸,制定出三个草案,然后
2、进行方案比选最终采用预应力连续箱梁桥。主梁采用每跨 35m,每联四跨共三联的 单箱双室结构,桥面总宽 12m,双向两车道,施工方法为满堂支架现浇混凝土施工。 第二,计算主梁内力及内力组合,其中用到 midas 计算分析软件,并由结果 估算出纵向的预应力筋的形状和面积。 第三,根据 midas 计算钢筋数目调试预应力钢筋的形状使其通过截面强度的 验算,并计算出预应力的损失,最后进一步进行截面强度的验算。 关键词: 箱梁、连续梁桥、预应力、MIDAS、 2 毕 业 设 计 ( 论 文 ) 外 文 摘 要 Title Title the design of Shi Qing highway Ping
3、Shan smelting river crossing (scheme 3) AbstractAbstract This graduation design is the main for the upper structure design of prestressed concrete continuous girder bridge. Prestressed concrete continuous girder bridge structure stress performance good, less expansion joints, deformation small, driv
4、ing smooth and comfortable, aseismic ability and maintenance and small quantities and become the most competitive one of the main bridge. Design of the main process: First, determine the girder of the bridge and the main structure and the structure, size and the details worked out three drafts, then
5、 for scheme comparison eventually adopt prestressed continuous box girder bridge. Girder with each span of 35 m, each league SiKua sanlian single box double chamber structure, bridge deck total 12 m wide, two-way two-lane, for full framing construction method for cast-in-situ concrete construction.
6、Second, main girder internal force calculation and internal force combination, covering the calculation analysis software Midas, and the results to estimate the number of longitudinal prestressed reinforcement. Third, based on Midas calculate debugging the shape of the prestressed reinforcement through calculating the strength of cross section, and calculate the prestress losses, finally further for calculating the strength o